Numerical Analysis for Energy Performance of Ground Source Heat Exchanger Under Environmental Conditions of Istanbul, Turkey

Abstract

By reason of limited amount of natural resources exploited for heating and cooling, and considering that reduction of environmental impact, people should strive to use renewable energy resources. The use of renewable energy sources decreases the energy consumption. Heat pump heating performance and cooling performance depends on the evaporator and condenser temperatures. The evaporator and condenser temperatures are dependants of heated / cooled environment and ambient temperature.Therefore, performance of the heat pump dependant of source/sink temperature directly. Source temperature is varies with summer and winter seasons. Considering ground source heat pumps, this variation is much smaller than the air, depending on the burying depth. Therefore, the COP of ground source heat pump is higher than the air source heat pumps. The ground can be used as a heat source and it has high thermal capacity. The temperature of the ground becomes relatively constant with depth and its temperature is a periodic function versus time and depth. Heat Pumps usually work with transient conditions. The effect of ground heat exchanger on thermal performance when they bury in environment which has high thermal storage (ρ*Cp) characteristics. Soil characteristics are appropriate for heat exchanger design in Istanbul. In this study, energy performance of the ground source heat exchanger has been evaluated for long term simulation with Computational Fluid Dynamics method according to conditions for Istanbul, Turkey. Furthermore, energy saving potential of new model has been evaluated. Additionally, by means of long term simulation, thermal imbalance of soil will be investigated.

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Author Information
Oyku Duman, Yildiz Technical University, Turkey
Hakan Demir, Yildiz Technical University, Turkey
Aliihsan Koca, Mir Technology Research and Development Co., Turkey
S. Ozgur Atayilmaz, Yildiz Technical University, Turkey
Ozden Agra,Yildiz Technical University, Turkey

• Category: Energy: Renewable Energy and Environmental Solutions

Posted by James Alexander Gordon

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